| 摘要 |
FIELD: electricity.SUBSTANCE: invention may be used as a position sensor in railway actuating mechanisms. The switching unit comprises at least one first fixed contact (1) for connection with the first conductor (101) of a power supply line, at least one second fixed contact (2) for connection with the second conductor (102) of the above line and the third contact designed for potential alternate movement into position wherein it touched simultaneously the first and second contacts and into position wherein the third contact is placed at some distance from the first and second contacts. The first or second contact has contact surface formed by a subset of separate contact areas (Zi) connected in parallel to the conductor connected to the respective contact, and each of them touches the other contact interacting with it independently.EFFECT: developing a switching unit, which has simple design and is stable to vibrations thus preventing generation of false signals of position feedback or signals, which may be perceived incorrectly by interlocking devices.15 cl, 17 dwg |
